場景說明
将一個GBK編碼的字元串傳回給Java層
誤區
因為這是一個GBK編碼的char*字元串,不可能直接調用函數直接傳回:
char* p;
jstring encoding = (env)->NewStringUTF(p);
出現如下的錯誤:the key point is "Modified UTF-8"is not like "Regular UTF-8", a legal Rgular UTF8 code sequence may beconsidered illegal against Modified UTF8.
正确的方式
需要建構一個GBK編碼的jstring,在參數中指定字元串的編碼格式
jstring cToJstringutf(JNIEnv* env, char* pat)
{
jclass strClass = (env)->FindClass("java/lang/String");
jmethodID ctorID = (env)->GetMethodID(strClass, "<init>",
"([BLjava/lang/String;)V");
jbyteArray bytes = (env)->NewByteArray(strlen(pat));
(env)->SetByteArrayRegion(bytes, 0, strlen(pat), (jbyte*) pat);
jstring encoding = (env)->NewStringUTF("gb2312");
jstring jstr = (jstring)(env)->NewObject(strClass, ctorID, bytes, encoding);
env->DeleteLocalRef(strClass);
env->DeleteLocalRef(bytes);
env->DeleteLocalRef(encoding);
return jstr;
}
問題編譯過程中出現警告:
uses2-byte wchar_t yet the output is to use 4-byte wchar_t;use of wchar_t valuesacross objects may fail
本文轉自fengyuzaitu 51CTO部落格,原文連結:http://blog.51cto.com/fengyuzaitu/1596484,如需轉載請自行聯系原作者